From afa459e851c764bf81d39298af6b4e9810f87104 Mon Sep 17 00:00:00 2001
From: Erik <erik@montnemery.com>
Date: Mon, 3 Aug 2026 11:38:24 +0200
Subject: [PATCH] Add test

---
 tests/components/knocki/test_config_flow.py | 55 ++++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

diff --git a/tests/components/knocki/test_config_flow.py b/tests/components/knocki/test_config_flow.py
index 8dbd394755d0..462c7a3bdcf6 100644
--- a/tests/components/knocki/test_config_flow.py
+++ b/tests/components/knocki/test_config_flow.py
@@ -17,9 +17,12 @@ from . import setup_integration
 
 from tests.common import MockConfigEntry
 
+DEVICE_ID = "KNC1-W-00000214"
+FORMATTED_MAC = "aa:bb:cc:dd:ee:ff"
+
 DHCP_DISCOVERY = DhcpServiceInfo(
     ip="1.1.1.1",
-    hostname="KNC1-W-00000214",
+    hostname=DEVICE_ID,
     macaddress="aabbccddeeff",
 )
 
@@ -168,6 +171,56 @@ async def test_dhcp_mac(
     assert device.connections == {(dr.CONNECTION_NETWORK_MAC, "aa:bb:cc:dd:ee:ff")}
 
 
+async def test_dhcp_mac_multiple_entries(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    device_registry: dr.DeviceRegistry,
+) -> None:
+    """Test the DHCP discovery updates the mac on every matching device.
+
+    Two config entries each own a device sharing the discovered identifier. The
+    migration to async_get_devices must update both devices; the deprecated
+    async_get_device would only have resolved to a single one.
+    """
+    mock_config_entry.add_to_hass(hass)
+    second_config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        title="Knocki 2",
+        unique_id="test-id-2",
+        data={CONF_TOKEN: "test-token"},
+    )
+    second_config_entry.add_to_hass(hass)
+
+    device_1 = device_registry.async_get_or_create(
+        config_entry_id=mock_config_entry.entry_id,
+        identifiers={(DOMAIN, DEVICE_ID)},
+    )
+    device_2 = device_registry.async_get_or_create(
+        config_entry_id=second_config_entry.entry_id,
+        identifiers={(DOMAIN, DEVICE_ID)},
+    )
+    assert device_1.id != device_2.id
+    assert device_1.connections == set()
+    assert device_2.connections == set()
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_DHCP}, data=DHCP_DISCOVERY
+    )
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "already_configured"
+
+    device_1 = device_registry.async_get_device_by_identifier(
+        (DOMAIN, DEVICE_ID), mock_config_entry.entry_id
+    )
+    device_2 = device_registry.async_get_device_by_identifier(
+        (DOMAIN, DEVICE_ID), second_config_entry.entry_id
+    )
+    assert device_1
+    assert device_2
+    assert device_1.connections == {(dr.CONNECTION_NETWORK_MAC, FORMATTED_MAC)}
+    assert device_2.connections == {(dr.CONNECTION_NETWORK_MAC, FORMATTED_MAC)}
+
+
 async def test_dhcp_already_setup(
     hass: HomeAssistant,
     mock_knocki_client: AsyncMock,